/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlets;

import entity.Users;
import facade.UsersFacadeLocal;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ejb.EJB;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Svetlana Shikhutskaya
 */
public class AddUser extends HttpServlet {
    @EJB
    private UsersFacadeLocal usersFacade;


    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        String login = request.getParameter("Login");
        String first_name = request.getParameter("First_Name");
        String last_name = request.getParameter("Last_Name");
        String email = request.getParameter("E_mail");
        String address = request.getParameter("Address");
        String password = request.getParameter("Password");
        String roles = request.getParameter("Roles");
        String h_password="";
        String[] userRoles;
        if (roles == "") {
            userRoles = null;
        } else {
            userRoles = roles.split(",");
        }
        try {
            h_password = computeHash(password);
        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(RegisterServlet.class.getName()).log(Level.SEVERE, null, ex);
        } catch (UnsupportedEncodingException ex) {
            Logger.getLogger(RegisterServlet.class.getName()).log(Level.SEVERE, null, ex);
        }
        if (password != null) {
            Users user = new Users();
            user.setFirstName(first_name);
            user.setLastName(last_name);
            user.setLogin(login);
            user.setPassword(h_password);
            user.setAddress(address);
            user.setEMail(email);
            boolean isUserCreated;
            isUserCreated = usersFacade.createUser(user, userRoles);
        }
    }
    
    private String computeHash(String input) throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest digest = MessageDigest.getInstance("SHA-256");
        digest.reset();

        byte[] byteData = digest.digest(input.getBytes("UTF-8"));
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < byteData.length; i++) {
            sb.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
        }
        return sb.toString();
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
